When 17 people were in orbit around the Earth all at the same time on May 30, 2023, it set a record. With NASA and other federal space agencies planning more manned missions and commercial companies bringing people to space, opportunities for human space travel are rapidly expanding.
. The back of the eye can become flattened, and the nerves that carry visual information from the eye to the brain swell and bend. Astronauts can still see, though visual function may worsen for some. Though it hasn't been well studied yet,Scientists may be able to shift the fluids back toward the lower body usingthat pull fluids back down toward the lower body like a vacuum.
Earthrise, a famous image taken during an Apollo mission, shows the Earth from space. While seeing the Earth from afar, many astronauts report feeling an awed 'overview effect.' Credit:
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